Add the chicken breasts, salsa, taco seasoning, black beans, and chicken broth to the crockpot and stir.
Cover and cook on low for 6 to 7 hours or on high for 3 to 4 hours, until the chicken is tender and shreds easily.
Shred the chicken with two forks, either right in the pot or by removing it, shredding, and returning it.
Stir in the instant rice, cover, and cook on high for 10 to 15 minutes, until the rice is tender and the liquid is absorbed.
Sprinkle the shredded cheddar over the top, cover, and let it melt for a few minutes.
Garnish with green onion and serve with a dollop of Greek yogurt and a drizzle of hot sauce.